test_API.py

from fastapi.testclient import TestClient
from restAPIServer import app

client = TestClient(app)

def test_convert_to_utf8():
    response = client.post("/convert/utf8/", json={"unit_string": r"\metre"})
    assert response.status_code == 200
    assert response.json() == ["m"]

def test_convert_to_latex():
    response = client.post("/convert/latex/", json={"unit_string": r"\metre\tothe{2}"})
    assert response.status_code == 200
    assert response.json() == ['$$\\mathrm{m}^{2}$$'] # Adjust based on actual response structure

def test_compare_units_equal():
    response = client.post("/compare/units/", json={"unit_string1": r"\watt", "unit_string2": r"\joule\per\second"})
    assert response.status_code == 200
    assert response.json() == {'scale_factor': 1.0, 'base_unit': '\\kilogram\\metre\\tothe{2}\\second\\tothe{-3}'}  # Example expected response

def test_compare_units_not_equal():
    response = client.post("/compare/units/", json={"unit_string1": r"\metre", "unit_string2": r"\second"})
    assert response.status_code == 200
    assert "error" in response.json()  # Checking for error message

def test_compare_units_not_equal_but_equal_WithCompleate():
    response = client.post("/compare/units/", json={"unit_string1": r"\one", "unit_string2": r"\percent", })
    assert response.status_code == 200
    assert "error" in response.json()  # Checking for error message
    response = client.post("/compare/units/", json={"unit_string1": r"\one", "unit_string2": r"\percent", "complete":True})
    assert response.status_code == 200
    assert response.json()  ==  {'scale_factor': 0.01, 'base_unit': '\\one'}

def test_invalid_unit():
    response = client.post("/convert/utf8/", json={"unit_string": "not_a_unit"})
    assert response.status_code == 500  # Assuming your API returns 500 for invalid units